This mod replaces many billboards inside the gta 5 universe
I tried to create an oiv file, but unfortunately I still don't understand the process to create it. It would be great if someone who knows about it could create an oiv or dlc file to make the installation simpler.
If you want to install it the current way, take your time ; o ).

Installation:
open openIV and enable edit mode.

go to: C:\Games\Grand.Theft.Auto.V\mods\x64t.rpf\levels\gta5\_hills\country_04\cs4_01.rpf\
replace
cs4_01_lod.ytd
cs4_01_billboards.ytd

go to: C:\Games\Grand.Theft.Auto.V\mods\x64t.rpf\levels\gta5\_hills\country_04\country_04.rpf\
replace
cs4_lod_01_slod2_children.ytd

C:\Games\Grand.Theft.Auto.V\mods\x64t.rpf\levels\gta5\_hills\country_04\cs4_04.rpf\
replace
cs4_04_bb_hd_2.ydr
open cs4_04_build3+hi.ytd
and replace cs4_04_rsl_mr_signs (files / folder1)
open cs4_04_build3.ytd
and replace cs4_04_rsl_mr_signs (files / folder2)
open cs4_04_lod.ytd
and replace cs4_04_rsl_mr_bb_lod

open C:\Games\Grand.Theft.Auto.V\mods\x64t.rpf\levels\gta5\_hills\country_04\country_04.rpf\
open cs4_lod_04_slod2_children.ytd
and replace
bills_foreclosure_billboard_2x1slod
cs4_04_superlod

open C:\Games\Grand.Theft.Auto.V\mods\x64t.rpf\levels\gta5\_hills\country_04\cs4_09.rpf\
and replace
cs4_09_bilbrd_01.ydr
cs4_09_bilbrd_01+hidr.ytd

open cs4_09_lod.ytd
and replace bills_foreclosure_billboard_2x1lod

open C:\Games\Grand.Theft.Auto.V\mods\x64t.rpf\levels\gta5\_hills\country_04\cs4_11.rpf\
and replace cs4_11_billb_uniteas.ydr
open cs4_11_lod.ytd and replace unite_alamosea_proanti_billboard_2x1_lod

open C:\Games\Grand.Theft.Auto.V\mods\x64t.rpf\levels\gta5\_hills\country_04\cs4_12.rpf\
and replace
cs4_12_billbd_01.ydr
cs4_12_billbd_01+hidr.ytd
cs4_12_billbd_03.ydr
cs4_12_billbd_03+hidr.ytd
cs4_12_billbd_04.ydr
cs4_12_hd_misc.ytd
cs4_12_hd_misc+hi.ytd
cs4_12_lod.ytd

open C:\Games\Grand.Theft.Auto.V\mods\x64t.rpf\levels\gta5\_hills\country_04\country_04.rpf\
and replace cs4_lod_12_slod2_children.ytd

open C:\Games\Grand.Theft.Auto.V\mods\x64t.rpf\levels\gta5\_hills\country_04\cs4_13.rpf\
and replace
cs4_13_billbd_01.ydr
cs4_13_billbd_01+hidr.ytd

open cs4_13_lod.ytd
and replace
bills_foreclosure_billboard_2x1lod
dt1_17_rsd_zm_04_lod

open C:\Games\Grand.Theft.Auto.V\mods\x64t.rpf\levels\gta5\_hills\country_04\country_04.rpf\
and replace bills_foreclosure_billboard_2x1slod

open C:\Games\Grand.Theft.Auto.V\mods\x64t.rpf\levels\gta5\_hills\country_04\cs4_14.rpf\
and replace
cs4_14_bb.ytd
cs4_14_build1.ytd
cs4_14_build1+hi.ytd
cs4_14_lod.ytd

open C:\Games\Grand.Theft.Auto.V\mods\x64i.rpf\levels\gta5\_citye\downtown_01\dt1_06.rpf\
and replace dt1_06_build2_1.ydr
open dt1_06_lod.ytd and replace dt1_06_wall_0001x_lod

open C:\Games\Grand.Theft.Auto.V\mods\x64t.rpf\levels\gta5\_hills\country_05\cs5_1.rpf\
and replace
cs5_1_slod.ytd
cs5_1_lod.ytd
cs5_1_billboards.ytd
cs5_1_billboard-bravado.ydr

open C:\Games\Grand.Theft.Auto.V\mods\x64t.rpf\levels\gta5\_hills\country_05\cs5_roads.rpf\
replace
cs5_roads_bill01.ydr
cs5_roads_billbrd_006.ydr
cs5_roads_billbrd_007.ydr
cs5_roads_billbrd_008.ydr
cs5_roads_billbrd_002.ydr
cs5_roads_lod.ytd

open C:\Games\Grand.Theft.Auto.V\mods\x64t.rpf\levels\gta5\_hills\country_05\cs5_lod.rpf\
and replace
cs5_lod_slod3.ytd

open C:\Games\Grand.Theft.Auto.V\mods\x64t.rpf\levels\gta5\_hills\country_05\country_05.rpf\
and replace
cs5_lod_rd_slod2_children.ytd

open C:\Games\Grand.Theft.Auto.V\mods\x64i.rpf\levels\gta5\_citye\downtown_01\dt1_14.rpf\
and replace
dt1_14_bld.ytd
dt1_14_bld+hi.ytd
dt1_14_build3.ydr
dt1_14_build3+hidr.ytd
dt1_14_lod.ytd

open C:\Games\Grand.Theft.Auto.V\mods\x64i.rpf\levels\gta5\_citye\downtown_01\downtown.rpf\
open dt1_lod_06_07_08_14_15_16_17_children.ytd and replace dt1_14_superlod.dds

open C:\Games\Grand.Theft.Auto.V\mods\x64j.rpf\levels\gta5\_citye\hollywood_01\hw1_02.rpf\
open hw1_02_build+hi.ytd and replace hw2_2_rn_ja_bboards_combi (files / folder 5)
open hw1_02_build.ytd and replace hw2_2_rn_ja_bboards_combi (files / folder 6)
open hw1_02_lod.ytd and replace
hw1_02_bb_lods
hw1_02_wall_lod

open C:\Games\Grand.Theft.Auto.V\mods\x64j.rpf\levels\gta5\_citye\hollywood_01\hw1_03.rpf\
open hw1_03_build1.ytd and replace ja_rn_temphw_bb_2
open hw1_03_lod.ytd and replace
hw_03_ground_lod
hw_03_superlod

open C:\Games\Grand.Theft.Auto.V\mods\x64j.rpf\levels\gta5\_citye\hollywood_01\hollywood.rpf\
open hw1_lod_03_04_children.ytd
and replace
hw1_04_superlod
hw_03_superlod

open C:\Games\Grand.Theft.Auto.V\mods\x64j.rpf\levels\gta5\_citye\hollywood_01\hw1_04.rpf\
open hw1_04_build+hi.ytd and replace bishopschicken_billboards_b (folder7)
open hw1_04_build.ytd and replace bishopschicken_billboards_b (folder8)
open hw1_04_lod.ytd and replace ja_rn_temphw_bb_4_lod

open C:\Games\Grand.Theft.Auto.V\mods\x64j.rpf\levels\gta5\_citye\hollywood_01\hw1_07.rpf\
and replace
hw1_07_build_sa.ydr
hw1_07_elpitbase.ydr
open hw1_07_lod.ytd and replace hw1_07_billboardlod

open C:\Games\Grand.Theft.Auto.V\mods\x64j.rpf\levels\gta5\_citye\hollywood_01\hw1_09.rpf\
and replace
hw1_09_billboards.ydr
hw1_09_billboards+hidr.ytd
open hw1_09_lod.ytd and replace hw1_09_bboards_lod

open C:\Games\Grand.Theft.Auto.V\mods\x64j.rpf\levels\gta5\_citye\hollywood_01\hw1_15.rpf\
and replace hw1_15_build2.ydr
open hw1_15_lod.ytd and replace
hw1_15_billboards_01_lod
hw1_15_wall_01_lod.dds

open C:\Games\Grand.Theft.Auto.V\mods\x64j.rpf\levels\gta5\_citye\hollywood_01\hw1_16.rpf\
open hw1_16_build+hi.ytd and replace hw1_16_tpage_ro_01 (files / folder3)
open hw1_16_build.ytd and replace hw1_16_tpage_ro_01 (files / folder4)
open hw1_16_lod.ytd and replace hw1_16_bboard_001_lod

open C:\Games\Grand.Theft.Auto.V\mods\x64j.rpf\levels\gta5\_citye\hollywood_01\hollywood.rpf\
open hw1_lod_08_09_16_17_18_children.ytd and replace
hw1_18_superlod
hw1_16_superlod

open C:\Games\Grand.Theft.Auto.V\mods\x64j.rpf\levels\gta5\_citye\hollywood_01\hw1_18.rpf\
and replace hw1_18_ground01.ydr

open C:\Games\Grand.Theft.Auto.V\mods\x64m.rpf\levels\gta5\_cityw\sanpedro_01\sp1_04.rpf\
replace
sp1_04.ytd
sp1_04+hi.ytd
sp1_04_lod.ytd

open C:\Games\Grand.Theft.Auto.V\mods\x64m.rpf\levels\gta5\_cityw\sanpedro_01\sanpedro.rpf\
open sp1_lod_01_04_06_07_slod2_children.ytd and replace
sp1_04_slod
sp1_07_slod

open C:\Games\Grand.Theft.Auto.V\mods\x64m.rpf\levels\gta5\_cityw\sanpedro_01\sp1_05.rpf\
and replace
sp1_05_ground.ydr
sp1_05_ground+hidr.ytd
sp1_05_lod.ytd

open C:\Games\Grand.Theft.Auto.V\mods\x64m.rpf\levels\gta5\_cityw\sanpedro_01\sanpedro.rpf\
open sp1_lod_03_05_children.ytd and replace sp1_05_superlod

open C:\Games\Grand.Theft.Auto.V/mods\x64m.rpf\levels\gta5\_cityw\sanpedro_01\sp1_07.rpf\
and replace
sp1_07.ytd
sp1_07+hi.ytd
sp1_07_lod.ytd

open C:\Games\Grand.Theft.Auto.V\mods\x64m.rpf\levels\gta5\_cityw\sanpedro_01\sanpedro.rpf\
open sp1_lod_01_04_06_07_slod2_children.ytd and replace sp1_07_slod

open C:\Games\Grand.Theft.Auto.V\mods\x64m.rpf\levels\gta5\_cityw\sanpedro_01\sp1_11.rpf\
replace
sp1_11+hi.ytd
sp1_11.ytd
sp1_11_lod.ytd

open C:\Games\Grand.Theft.Auto.V/mods\x64m.rpf\levels\gta5\_cityw\sanpedro_01\sanpedro.rpf\
open sp1_lod_10_11_children.ytd and replace
sp1_11_billboards_slod
sp1_11_superlod

open C:\Games\Grand.Theft.Auto.V\mods\x64m.rpf\levels\gta5\_cityw\sanpedro_01\sp1_12.rpf\
and replace
sp1_12_billboards.ytd
sp1_12_billboards+hi.ytd
sp1_12_lod.ytd

open C:\Games\Grand.Theft.Auto.V\mods\x64m.rpf\levels\gta5\_cityw\sanpedro_01\sanpedro.rpf\
and replace
sp1_lod_12a_children.ytd
sp1_lod_12b_children.ytd
sp1_lod_12c_children.ytd

If you are using the real california architecture (rca) mod go to
C:\Games\Grand.Theft.Auto.V\mods\update\x64\dlcpacks\rca\dlc.rpf\x64\sunset.rpf\
and replace
ss1_11+hi.ytd
ss1_11.ytd
ss1_11_lod.ytd

open C:\Games\Grand.Theft.Auto.V\mods\x64l.rpf\levels\gta5\_citye\sunset\ss1_05.rpf\
and replace
ss1_05_build.ytd
ss1_05_build+hi.ytd
ss1_05_building_lod.ytd
ss1_05_buildnew_a+hidr.ytd
ss1_05_buildnew_a.ydr

open C:\Games\Grand.Theft.Auto.V\mods\x64l.rpf\levels\gta5\_citye\sunset\sunset.rpf\
open ss1_lod_05_children.ytd and replace ss1_05_slod

open C:\Games\Grand.Theft.Auto.V\mods\x64l.rpf\levels\gta5\_citye\sunset\bt1_02.rpf\
and replace
bt1_02_build+hi.ytd
bt1_02_build.ytd
open bt1_02_lod.ytd and replace bt1_02_ground

open C:\Games\Grand.Theft.Auto.V\mods\x64j.rpf\levels\gta5\_citye\indust_01\id1_06.rpf\
and replace
id1_06_watertower.ydr
id1_06_watertower+hidr.ytd

open C:\Games\Grand.Theft.Auto.V\mods\x64j.rpf\levels\gta5\_citye\indust_01\id1_07.rpf\
and replace
id1_07_ground.ytd
id1_07_lod.ytd

open C:\Games\Grand.Theft.Auto.V\mods\x64j.rpf\levels\gta5\_citye\indust_01\id1_32.rpf\
and replace
id1_32_build666a+hidr.ytd
id1_32_build666a.ydr
id1_32_lod.ytd

Please tell me in the comments if you like the mod or if you have problems with it or you see any mistakes.
Nobody is perfect...
Thanks and have fun,
Mikesta